RX7 Turbos

[XEFalconUte]

I'm trying to find a compressor map for a RX7 series five or six turbo charger.

Thanks

Simon

[a777]

As far as I know you won't be able to find one. As a rough guide the stock Series V turbo is good for around 300hp. It has a relatively large exhaust housing (compared to normal piston engine turbos). There are a number of discussions on PF about fitting them to engines like 202s 186s etc. I also know of them being fitted to RB20 engines (2 litre 6 cylinder) with good results.

Boost - most people would recommend 12psi-15psi.

Hope this helps, what information are you looking for? :)

[XEFalconUte]

I need turbos, for my current project, a 545 CI BigBlockFord I hope to run about 25 psi @ 7000 rpm I was hoping to find a turbo that came of a production car (or truck more than likely).

What I am not sure about is desiel truck turbos, I know they run the required PSI abet at lower revs, but what I'm not sure about is exhaust temperature. From what I remember deisel exhaust temperatures are lower than petrol (or LPG). Though I'm not sure if the turbine and housing would stand up to petrol exhaust temps.

Spool times are not of great concern to me so a plain bearing turbo (or two) would suit me just fine.

thanks Simon

[syn.13b]

for an engine that size you will need two HUGE turbos probably HT3B's but they are worth about 2500 dollars each. what h/p are you trying to achieve?

[XEFalconUte]

The best computer simulation I've gotten so far is ~1300 HP at the flywheel.(Dyno 2000) The bottom end is almost complete. (The machinest have nearly finished my crank after nine months !!) so it's time to dummy the inlet and exhausts.

The calculations I've done so far have led me to a 1.82 pressure ratio and 103lb/min flow. I'm not gonna get a single turbo that big under the bonnet so I need to know what twin turbo setup will work, hence I need compressor maps of some of the larger plain bearing turbo avaliable.

I don't have the need for the latest BB turbos as my engine will not be used if on-off applications.

any help finding a plain bearing turbo to suit my needs would be greatfully appreciated.

Thanks

Simon